The flu was first observed in Europe, the United States and parts of Asia before swiftly spreading around the world. At the time, there were no effective drugs or vaccines to treat this killer flu strain. Citizens were ordered to wear masks, schools, theaters and businesses were shuttered and bodies piled up in makeshift morgues before the virus ended its deadly global march. Influenza, or flu, is a virus that attacks the respiratory system. The flu virus is highly contagious: When an infected person coughs, sneezes or talks, respiratory droplets are generated and transmitted into the air, and can then can be inhaled by anyone nearby. Additionally, a person who touches something with the virus on it and then touches his or her mouth, eyes or nose can become infected. Flu outbreaks happen every year and vary in severity, depending in part on what type of virus is spreading. Flu viruses can rapidly mutate.
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Scientists and medical researchers have for years have differed over the exact definition of a pandemic is it a pandemic, or an epidemic, but one thing everyone agrees on is that the word describes the widespread occurrence of disease, in excess of what might normally be expected in a geographical region. Cholera, bubonic plague, smallpox, and influenza are some of the most brutal killers in human history. And outbreaks of these diseases across international borders, are properly defined as pandemic, especially smallpox, which throughout history, has killed between million people in its 12, year existence. While it was initially seen to be an epidemic in China, the virus spread worldwide within months. The WHO declared Covid a pandemic in March, and by the end of that month, the world saw more than a half-million people infected and nearly 30, deaths.